Daily Report for 23rd June 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.2 °C (-1.4) 04:57 10.8 °C (-1.0) 18.2 °C (+5.6), 2016 7.7 °C (-4.9), 2021
Maximum Temperature 19.2 °C (-2.4) 12:40 19.2 °C (-1.5) 28.5 °C (+6.9), 2020 17.2 °C (-4.4), 2013
Mean Temperature 15.3 °C (-1.9) 15.0 °C (-1.2) 21.8 °C, 2023 14.9 °C, 2013
Minimum Humidity 46% 14:30 50% 85%, 2016 24%, 2018
Maximum Humidity 86% 05:45 87% 92%, 2019 69%, 2010
Mean Humidity 64% 69% 88%, 2016 50%, 2010
Minimum Pressure 1012 hPa 03:04 1011 hPa 1027 hPa, 2018 1005 hPa, 2013
Maximum Pressure 1019 hPa 23:26 1017 hPa 1031 hPa, 2018 1014 hPa, 2022
Mean Pressure 1016 hPa 1014 hPa 1029 hPa, 2018 1009 hPa, 2013
Mean Wind Speed 6.3 mph (+1.9) 5.4 mph (+1.0) 7.9 mph, 2013 0.7 mph, 2014
Maximum Wind Speed 13.5 mph 14.2 mph 17.0 mph, 2013 7.4 mph, 2014
Maximum Gust 17.6 mph 12:48 20.5 mph 25.9 mph, 2013 10.2 mph, 2014
Mean Wind Direction W
Rainfall trace 72.4 mm (201%) 30.4, 2016
Maximum Hourly Rain n/a 11.5, 2016
Maximum 10-min Rain n/a 4.1, 2016
Maximum Rain Rate n/a 102, 2016
Minimum Dew Point 5.8 °C 19:32 6.1 °C 15.1 °C, 2016 0.6 °C, 2018
Maximum Dew Point 15.4 °C 08:02 12.1 °C 19.2 °C, 2016 8.4 °C, 2015
Mean Dew Point 8.2 °C 9.1 °C 17.5 °C, 2016 7.3 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.2 °C 05:00 11.0 °C 18.5 °C, 2016 7.7 °C, 2021
Day Maximum (09-21) 19.2 °C 12:40 19.2 °C 28.5 °C, 2020 17.2 °C, 2013
Max 10m Temp Rise 0.8 °C 13:53 0.6 °C 1.5 °C, 2016 0.5 °C, 2010
Max 1hr Temp Rise 1.8 °C 08:05 2.4 °C 3.8 °C, 2022 1.4 °C, 2013
Max 1hr Hum Rise 8% 13:40 10% 17%, 2013 6%, 2010
Max 10m Temp Fall 0.5 °C 12:55 0.6 °C 0.7 °C, 2012 0.3 °C, 2017
Max 1hr Temp Fall 2.3 °C 13:31 1.8 °C 2.7 °C, 2021 1.1 °C, 2019
Max 1hr Hum Fall 8% 10:47 10% 22%, 2022 6%, 2016
Max 10m Wind Speed 9.1 mph 17:27 9.6 mph 12.8 mph, 2013 4.5 mph, 2014
Minimum Feels-like 11.9 °C 04:38 10.7 °C 22.9 °C, 2016 7.7 °C, 2021
Maximum Feels-like 19.6 °C 12:36 20.5 °C 32.5 °C, 2020 18.0 °C, 2013
Mean Feels-like 15.9 °C 16.0 °C 25.7 °C, 2023 15.5 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.0 °C (-1.1) 8.4 °C (-0.5) 15.9 °C (+6.8), 2020 3.3 °C (-5.8), 2016
Humidity Range 40% 37% 60%, 2018 6%, 2016
Pressure Range 7 hPa 6 hPa 11 hPa, 2013 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6 [40%]129 hrs (87%) [37%] 15.1 [100%], 2020 0.1 [1%], 2016
Wet Hours 0.454 hrs (190%) [9.8%] 12, 2016 0, 2009
Cloud Cover Partly Cloudy with periods of Mostly Cloudy
Events None
Comments 13 Light Shower
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 23rd June 2011.
Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs are derived based on analysis of webcam observations, but may use data from our closest site, Heathrow, when needed.
Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually.
Rainfall totals may be manually adjusted after the fact to correct delayed or erroneous data.
Cloud cover and Events are manually reported, often with multi-week delays.
Data is generally reliable and accurate but should always be viewed with some quantity of salt to hand.
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Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions


Webcam summary not available for this day

Wind rose